This article examines the legacy of war on environmental policy, contributing to recent literature on the linkages between armed violence, conservation, rural livelihoods and global value chains. It argues that environmental norms reshape agricultural practices, but also the means by which people claim control over land and labour. Using the case of cocoa in Côte d'Ivoire, this paper examines the impact of ‘zero‐deforestation’ policies on the country's last agricultural frontier: its western forestlands, where migration and deforestation have driven the development of the cocoa economy for years. The region is now feeling the effects of global trade policies such as the European Deforestation‐Free Regulation (EUDR), competition for the last remaining forests and social fault lines inherited from the war. This article traces the origins of the zero‐deforestation policy, its national and local impact and its implications for social struggles over the control of land and labour.